Nuclear power can generate electricity without greenhouse gas emissions. However, there are concerns about its safety. Learn about the safety and health concerns associated with the threat of nuclear meltdowns, as well as the challenges involved in storing radioactive waste.he isotope U-235 is important because it can be used in the nuclear fission chain reaction to create a lot of energy. Unlike the uranium used in a nuclear bomb, which is about 90% enriched with the isotope U-235, the uranium used in a nuclear reactor is only slightly enriched, to about four or five percent.
1 Professional sod installation typically costs $500 to $1,000 for a 2,000 sq. ft. or smaller lawn. 2  Per square foot installation costs average $.50 to $1.00. 3  Installing sod on smaller lawns tends to cost more per square foot.
If you decide to have one installed, some sod installers can also install irrigation systems while others will have people they routinely work with for such things. Installing an irrigation system in the average yard can cost around $1,000 for a simple system if done on a bare yard (no lawn).If you plan to have one put in, the time to do it is before the sod goes on. Installing one in an existing yard can cost $1,300 for the system alone.f you decide to have one installed, some sod installers can also install irrigation systems while others will have people they routinely work with for such things. Installing an irrigation system in the average yard can cost around $1,000 for a simple system if done on a bare yard (no lawn).